We analyze the performance of adiabatic quantum computation (AQC) subject to decoherence. To this end, we introduce an inherently open-systems approach, based on a recent generalization of the adiabatic approximation. In contrast to closed systems, we show that a system may initially be in an adiabatic regime, but then undergo a transition to a regime where adiabaticity breaks down. As a conseq...

Recently, Marzlin and Sanders (2004) demonstrated an inconsistency when the adiabatic approximation was applied to specific, ”inverse” time-evolving systems. Following that, Tong et al. (2005) showed that the widely used traditional adiabatic conditions are insufficient to guarantee the validity of the adiabatic approximation for this class of systems. In this article we explore the origin of t...

Massive high-strength concrete structures tend to have a high risk of cracking. Ground slag powder (GSP), sustainable and green industrial waste, is suitable for concrete. We carried out an experimental study the effects GSP with specific surface area 659 m2/kg on hydration, pore structure, compressive strength chloride ion penetrability resistance Results show that adding 25% increases adiabat...

We present a gauge-invariant formalism to study the evolution of curvature perturbations in a Friedmann-Robertson-Walker universe filled by multiple interacting fluids. We resolve arbitrary perturbations into adiabatic and entropy components and derive their coupled evolution equations. We demonstrate that perturbations obeying a generalised adiabatic condition remain adiabatic in the large-sca...

the dependence of some thermodynamic properties of spin-polarized liquid 3he such as velocity of sound, adiabatic index, isentropic compressibility and temperature on the spin polarization has been investigated along different isentropic paths. the lennard-jones potential has been used in our calculations. it has been found that for higher values of entropy, the spin polarization has greater ef...

the objective of this paper is to develop an artificial neural network (ann) model which can beused to predict temperature rise due to climate change in regional scale. in the present work data recorded overyears 1985-2008 have been used at training and testing steps for ann model. the multilayer perceptron(mlp) network architecture is used for this purpose. three applied optimization methods a...

Photometric investigations are reported in laminar, preaixed shielded flames above the reaction zone, burning at atmospheric pressure. In these CO/Ng/Og -, CpHg/Np/Op and H^/O /N, flames metal y&por via introduced. Flame temperatures ranged frcn 2000 to 2500 K, rise-velocities from ') to 15 A/sec. The question is discussed as to what extent thermodynamic equilibrium does exist in ! certain part...